Knowing Ainge, I don't know what to think. One part of me says he wouldn't dare. But it's not like he hasn't taken on a headcase or two before, so that probability gap, however small it may be, is still there.
I believe Ainge when he says that Pruitt is the backup PG next year though. So all he needs is a third string option.
Don't think House wants to come back in such a role. Look for him to be outie.
Now with regard to third stringer(s) - who can step into a second unit when called upon, I think Danny's looking for someone who can accept sitting on the bench for long periods of time. Someone who can play, but someone who will keep his mouth shut if needed. I'm thinking Tyronn Lue could be an option (also great friends with KG, from what I've heard).
Jason Williams and Stephon Marbury don't seem like people you'd want sitting on the bench most of the time. They seem like chemistry disrupters, not exactly stabilizers.
But we did sign Sam Cassell, who was a known threat to ubuntu before he was bought out by the Clippers. So we really have no idea. As fans we're basically just left with trying to analyze things and over-analyze and re-interpret them in as many ways possible even though only a few select people know exactly what's going on without all the over-analytical stuff involved.